Yassaei Soghra, Dadfarnia Shayesta, Ahadian Hakima, Moradi Farshad
Department of Orthodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Orthodontics (Chic.). 2013;14(1):e76-81. doi: 10.11607/ortho.810.
The purpose of this study was to investigate the salivary concentration of nickel and chromium of patients undergoing orthodontic treatment.
In this study 32 patients who presented to the orthodontic clinic were selected. The salivary samples were taken from the patients in four stages: before appliance placement and 20 days, 3 months, and 6 months following appliance placement. The salivary samples were collected in a plastic tube and were stored in the freezer before analysis. The samples were then transferred to the laboratory, and the amounts of metals were determined by graphite furnace atomic absorption spectrometry with an autosampler. Each sample was analyzed three times, and the average was reported.
It was found that the average amount of nickel in the saliva 20 days after appliance placement was 0.8 μg/L more than before placement. Also, the amount of salivary nickel 20 days after the appliance placement was more than at the other stages, but the differences were not significant. The average amount of chromium in the saliva was found to be between 2.6 and 3.6 μg/L. The amount of chromium at all stages after appliance placement was more than before, but the differences between the chromium levels of saliva at all stages were not significant.
There was no significant difference in the average amount of salivary nickel and chromium of patients at various stages of orthodontic appliance placement.
本研究旨在调查接受正畸治疗患者唾液中镍和铬的浓度。
本研究选取了32名到正畸诊所就诊的患者。在四个阶段采集患者的唾液样本：矫治器放置前以及矫治器放置后20天、3个月和6个月。唾液样本收集在塑料管中，在分析前保存在冰箱中。然后将样本转移到实验室，使用自动进样器通过石墨炉原子吸收光谱法测定金属含量。每个样本分析三次，并报告平均值。
发现矫治器放置后20天唾液中镍的平均含量比放置前高0.8μg/L。此外，矫治器放置后20天唾液中镍的含量高于其他阶段，但差异不显著。唾液中铬的平均含量在2.6至3.6μg/L之间。矫治器放置后各阶段铬的含量均高于放置前，但各阶段唾液中铬水平的差异不显著。
正畸矫治器放置各阶段患者唾液中镍和铬的平均含量无显著差异。
